PURPOSE: To obtain a liquid crystal oriented film showing a stable oriented state of the liquid crystal and a pretilt angle without depending on the process conditions or the use environment and having good electro-optical characteristics by incorporating a polyamide acid containing aliphatic tetracarboxylic acid dianhydride as an essential component and a polyamide acid containing aromatic tetracarboxylic acid dianhydride as an essential component.

CONSTITUTION: This orienting agent for a liquid crystal contains a polyamide acid containing aliphatic tetracarboxylic acid dianhydride as an essential component and a polyamide acid containing aromatic tetracarboxylic acid dianhydride as an essential component. When a compd. expressed by formula I is used as the polyamide acid containing aliphatic tetracarboxylic acid dianhydride as an essential component, especially excellent characteristics as a liquid crystal oriented film can be obtd. When a compd. expressed by formula II is used as the polyamide acid containing aromatic tetracarboxylic acid dianhydride as an essential component, especially excellent characteristics as a liquid crystal oriented film can be obtd.